We run the following linear regression model in Excel (or any
other softwares) Yi = β0 + β1Xi + β2Wi + εi , where i = 1, 2, . . .
, 100. The results suggest that the slope on Xi is 97.28 with
t-statistics 0.91, and the slope on Wi is 15.81 with t-statistics
11.39. What does it tell us?